/*
 * Copyright (C) 2005 Jimi Xenidis <jimix@watson.ibm.com>, IBM Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * $Id$
 *
 */

#include <lib.h>

char *
strstr(const char *s, const char *sub)
{
	uval sl;
	uval subl;

	if (s != NULL) {
		/* this includes the NULL test of sub */
		subl = strlen(sub);
		if (subl == 0) {
			/* empty string always matches */
			return (char *)s;
		}
		sl = strlen(s);
		
		while (sl >= subl) {
			if (strncmp(s, sub, subl) == 0) {
				return (char *)s;
			}
			--sl;
			++s;
		}
	}
	return NULL;
}
